J Korean Soc Coloproctol.  2010 Apr;26(2):98-104. 10.3393/jksc.2010.26.2.98.

Invasiveness of and Drug Sensitivity to Various Anti-cancer Regimens in Five Colorectal Cancer Cell Lines

• Lee YM
• Yoon YS
• Roh SA
• Cho DH
• Kim JC

• KMID: 2198804
• DOI: http://doi.org/10.3393/jksc.2010.26.2.98

Abstract

PURPOSE
Colorectal cancer (CRC) is one of the leading causes of cancer death in South Korea. Angiogenesis has been associated with invasion and metastasis of tumors and with the secretion of various growth factors. Bevacizumab is a humanized monoclonal antibody that recognizes and blocks vascular endothelial growth factor (VEGF) and that targets integrin alphaVbeta3 and matrix metalloproteinases (MMPs) as angiogensis inhibitors. The aims of this study were identification of the mechanism of target molecules related to angiogenesis and demonstration of identifiable invasion by using chemotherapeutic regimens in vitro.
METHODS
The five colorectal cancer cell lines were treated with bevacizumab using standard or combined regimens. The expression of integrin alphaVbeta3 was detected and the investigation of apoptosis was done by using flow cytometry. The activations of MMP-2 and MMP-9 were measured by using gelatin zymography.
RESULTS
The apoptotic cell death was significantly increased for the combined regimens, especially for FOLFOX (5-FU, leucovorin, and oxaliplatin) with bevacizumab. Bevacizumab inhibited the expression of integrin alphaVbeta3 in the HT29 (59%), LoVo (67%), and SW480 (17%) cell lines, but did not in the AMC5 and the RKO cell lines. The activations of MMP-2 and MMP-9 were significantly reduced by treatment with bevacizumab in the HT29 and the LoVo cell lines. In the HT29 and the LoVo cell lines, thus, bevacizumab inhibited invasion and metastasis activity through down-regulation of integrin alphaVbeta3 and MMPs.
CONCLUSION
Our results provide biological evidence of potent angiogenic activity and indicate that angiogenesis is a complex process that involves multiple factors, including VEGF, integrin alphaVbeta3, and MMPs.

Keyword

Colorectal cancer; Chemotherapy; Bevacizumab; Angiogenesis

MeSH Terms

Antibodies, Monoclonal, Humanized
Apoptosis
Bevacizumab
Cell Death
Cell Line
Colorectal Neoplasms
Down-Regulation
Flow Cytometry
Gelatin
Humans
Integrin alphaVbeta3
Intercellular Signaling Peptides and Proteins
Leucovorin
Matrix Metalloproteinases
Neoplasm Metastasis
Republic of Korea
Vascular Endothelial Growth Factor A
Antibodies, Monoclonal, Humanized
Gelatin
Integrin alphaVbeta3
Intercellular Signaling Peptides and Proteins
Leucovorin
Matrix Metalloproteinases
Vascular Endothelial Growth Factor A